I accidentally deleted a game a bought from bigpond on my phone help!?

I bought it today and it lets you download the game for 5 days if you haven't downloaded it and I have downloaded it but accidentally deleted it. So when I try and download it again it says Network service unavailable.

Does anyone know how to get it back?
I didn't use iTunes when i bought it. I used bigpond internet on my mobile phone.
 
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